Crescent CMBD1 Quick Convert T-Handle Dual Material Bit Driver, RedUnique pin socket on driver handle self adjusts to a variety of fastener sizes and shape (capacity 1 4" to 1 2"). Quick conversion design allows users to adjust to a t handle position for increased torque. 50 in 1 drive includes: 1 4",5 16", 7 16" nut driver, #1 and #2 phillips bits, 3 16" and 9 32" slotted bits Unique pin socket on driver handle self adjusts to a variety of fastener sizes and shape (capacity 1 4" to 1 2") Quick conversion design